CN101701548B - Engine with adjustable compression ratio - Google Patents
Engine with adjustable compression ratio Download PDFInfo
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- CN101701548B CN101701548B CN200910228632A CN200910228632A CN101701548B CN 101701548 B CN101701548 B CN 101701548B CN 200910228632 A CN200910228632 A CN 200910228632A CN 200910228632 A CN200910228632 A CN 200910228632A CN 101701548 B CN101701548 B CN 101701548B
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Abstract
The invention discloses an engine with adjustable compression ratio, comprising a cylinder, a piston arranged in the cylinder and an upper connecting rod of which the upper end socket is articulated with the piston pin and the lower end socket is articulated with the eccentric pin; the eccentric pin is integrally formed with a first pin which is fixedly connected with one or two auxiliary driving wheels; the auxiliary driving wheels are coaxial with the first pin and are provided with an oscillating bar; one end of the oscillating bar is articulated on the first pin, and the other end is supported on a second pin on the engine cylinder and is coaxially connected with one or two active driving wheels which are parallel to the auxiliary driving wheels and rotate under control; the active driving wheels drive the auxiliary driving wheels to rotate; the middle part of the oscillating bar is provided with articulating points and is articulated with a lower connecting rod which is connected with a crank. The engine has low height of the complete machine of the engine, good rigidity of the crankshaft, long service life, low cost, good dynamic property, simple and convenient adjustment of compression ratio, great output low speed torque, high power, little fuel consumption and low discharge pollution.
Description
Technical field
The present invention relates to a kind of motor.Particularly relate to a kind of height that can keep conventional engines and have the better engine with adjustable compression ratio of bent axle stiffness characteristics.
Background technique
The conventional reciprocating internal-combustion piston engine is owing to the structural limitations of connecting rod, and compression ratio is unadjustable, has therefore limited the raising of its performance.Along with application number has successively appearred in technological progress is EP-0292603, and like the compression ratio adjustable type internal combustion machine of Fig. 1, and application number is 2007100567958, compression ratio adjustable type internal combustion machine as shown in Figure 2.
Wherein application number is the engine piston of 2007100567958 disclosed compression ratio adjustable type internal combustion machines, is to be connected with crank with fork through upper and lower strut, constitutes crankshaft axis and cylinder centerline and can have eccentric internal-combustion engine.Concrete formation is: connect piston last connecting rod lower end and connecting crank lower link upper tip through one be provided with auxiliary drive wheels the hinged direct transferring power of cam pin; Also connect a fork on this swivel pin, but directly be supported on the active drive wheel that fork the other end place on the cylinder body is provided with controlled rotation; Crankshaft axis can have off-centre with cylinder centerline.Three connecting rod type internal combustion engines that the major advantage of this mechanism is to look like existing report add fork through changing supporting point position changes compression ratio; Because that kind can make the mechanism dynamic characteristic degenerate, it is the length change compression ratio that the strong point of fork is fixedly leaned on the last connecting rod of being arranged of driving mechanism change thereby replace.But its deficiency; At first be this mechanism owing to use the structure of upper and lower strut and fork, limited by housing construction and slidercrank mechanism transmission condition, lower link can not be too short; Increase the height of motor so have to, this makes, and engine weight and size obviously strengthen, cost improves; Secondly, because engine crankshaft is arranged near the cylinder centerline, make that crank length is big, poor rigidity; The big limitations of these factors its practical application.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of engine crank length that can make significantly to reduce, and when its rigidity increases, the motor whole height can be reduced significantly, the engine with adjustable compression ratio that the motor cost obviously reduces.
The technological scheme that the present invention adopted is: a kind of engine with adjustable compression ratio; Include cylinder, be positioned at piston and upper tip and the hinged lower end of wrist pin and the hinged last connecting rod of cam pin of cylinder; Described cam pin is integrally formed with first pin that is connected with one or two auxiliary drive wheels; Described auxiliary drive wheels is coaxial with first pin; Also be provided with fork, an end of described fork is hinged on first pin, and the other end is supported on one or two active drive wheel that and controlled rotation parallel with auxiliary drive wheels were gone up and be coaxially connected with to the pin of second on the engine cylinder-body; Described active drive wheel drives auxiliary drive wheels and rotates; The middle part of described fork is provided with articulating point and is hinged with the lower link that links to each other with crank.
The vertical line of the vertical line of the shaft axis of the bent axle that described crank connected when piston is in top dead center position and the articulating point of fork is provided with prejudicially.
The position of the middle part articulating point of described fork is in the mid point with fork is the scope of the positive and negative 1/4 fork length of symmetry.
The position that is provided with of described bent axle is, make through the vertical line of this bent axle shaft axis and when piston is in top dead center position the mid point vertical line of fork have eccentricity value e and be: the central axis that is less than or equal to positive and negative 1/2 cylinder is provided with apart from the distance between the fork strong point.
Drive or drive through train of gearings between described active drive wheel and the auxiliary drive wheels through chain, friction wheel, belt mode.
Described fork two ends are provided with has an auxiliary drive wheels and active drive wheel that rotates and cooperate, when auxiliary drive wheels and active drive are taken turns the homonymy that all is arranged on fork when respectively being provided with; When auxiliary drive wheels and active drive wheel respectively was provided with two, one group of auxiliary drive wheels was wherein taken turns the both sides that are arranged on fork symmetrically with active drive wheel and another group auxiliary drive wheels and active drive.
Distance between the axis of the axis of described cam pin and first pin, the maximum adjustment range that makes engine compression ratio is between 6 to 23.
It is characterized in that described active drive wheel is driven by automatically controlled turbine and worm mechanism or gear mechanism.
Engine with adjustable compression ratio of the present invention has following characteristics: motor complete machine height is little, and bent axle good rigidity, life-span are long, and cost is low; Dynamics is good; Compression ratio adjustment is easy, and the low speed torque of output is big, power is high, and fuel consumption and exhaust emission are few.The Economy and the good dynamic property of automobile-used machine operating mode commonly used.Combine with igniting or injection advance angle adjusting, EGR, HCCI, supercharging and other variable techniques etc., not only can reduce discharging but also can keep good and economic, power character and higher power per liter and dwindle discharge capacity.On basis of the present invention, can use existing any internal-combustion engine advanced technology.
Description of drawings
Fig. 1 is the compression ratio adjustable type internal combustion machine structural representation of existing technology;
Fig. 2 is the compression ratio adjustable type internal combustion machine structural representation of another existing technology;
Fig. 3 is an engine with adjustable compression ratio structural representation of the present invention.
Wherein:
1: piston 2: go up connecting rod
3: wrist pin 4: fork
5. lower link 6: crank
7: 8: the first pins of cam pin
9: auxiliary drive wheels 10: block pin
11: active drive wheel 12: articulating point
13: crank pin 14: bent axle
15: crank pin and the crank spindle lap 16 of consigning: cylinder
Embodiment
Below in conjunction with embodiment and accompanying drawing engine with adjustable compression ratio of the present invention is made detailed description.
Engine with adjustable compression ratio of the present invention is to be the improvement of carrying out on the 2007100567958 disclosed technical foundation at application number, provides a kind of and not only can keep the advantage of said mechanism but also can evade the compression ratio adjustable type engines of its shortcoming.This motor can keep the height of conventional engines and compare throttleable motor than the better stiffness characteristics of traditional bent axle with a kind of new type of compression of the approaching dynamics of conventional engines.The present invention removes to have and can regulate compression ratio with working conditions change equally, thereby can improve the engine cycles thermal efficiency, combines with other technologies such as supercharging, also can obviously improve the engine fuel Economy, improves power performance, dwindles discharge capacity, reduces exhaust pollution.Can significantly reduce in engine crank length, and bent axle rigidity can reduce the motor whole height when increasing significantly, the motor cost obviously reduces.
For achieving the above object, the present invention realizes through following technology.Mainly comprise in-line arrangement and V-type internal combustion engine, the piston at least one cylinder, the cylinder, piston is connected with crank with lower link through last connecting rod, fork, constitutes internal-combustion engine.
Engine with adjustable compression ratio of the present invention mainly is meant in-line arrangement and V-type internal combustion engine, has a cylinder at least.As shown in Figure 3; Include cylinder 16, be positioned at the hinged last connecting rod 2 of piston 1 and upper tip and wrist pin 3 hinged lower ends and cam pin 7 of cylinder 16; Described cam pin 7 is integrally formed with first pin 8 that is connected with one or two auxiliary drive wheels 9; Described auxiliary drive wheels 9 is coaxial with first pin 8; Also be provided with fork 4, an end of described fork 4 is hinged on first pin 8, and the other end is supported on the block pin 10 on the engine cylinder-body and is coaxially connected with one or two active drive wheel 11 of and controlled rotation parallel with auxiliary drive wheels 9; Described active drive wheel 11 drives auxiliary drive wheels 9 and rotates; The middle part of described fork 4 is provided with articulating point 12 and is hinged with the lower link 5 that links to each other with crank 6.
Drive or drive through train of gearings between described active drive wheel 11 and the auxiliary drive wheels 8 through chain, friction wheel, belt mode.
Described active drive wheel 11 is driven by automatically controlled turbine and worm mechanism or gear mechanism according to engine operating condition information.
The condition that is provided with of each parts of engine with adjustable compression ratio of the present invention is:
The vertical line of the vertical line of the shaft axis of the bent axle 14 that described crank 6 is connected when piston 1 is in top dead center position and the articulating point 12 of fork 4 is provided with prejudicially.
The position of the middle part articulating point 12 of described fork 4 is in the mid point with fork 4 is the scope of the positive and negative 1/4 fork length of symmetry.
The position that is provided with of described bent axle 14 is, make through the vertical line of this bent axle 14 shaft axiss and when piston 1 is in top dead center position the mid point vertical line of fork 4 have eccentricity value e and be: the central axis that is less than or equal to positive and negative 1/2 cylinder 6 is provided with apart from the distance between fork 4 strong points.
The auxiliary drive wheels 9 that cooperates that rotates that has that described fork 4 two ends are provided with takes turns 11 with active drive, when auxiliary drive wheels 9 respectively is provided with one with active drive wheel 11, all is arranged on the homonymy of fork; When auxiliary drive wheels 9 respectively was provided with two with active drive wheel 11, one group of auxiliary drive wheels 9 wherein and active drive wheel 11 and another group auxiliary drive wheels 9 and active drive wheel 11 were arranged on the both sides of fork symmetrically.
Distance between the axis of the axis of described cam pin 7 and first pin, the maximum adjustment range that makes engine compression ratio is between 6 to 23.
The upper tip of last connecting rod 2 lower ends of connection piston and the lower link 5 of connecting crank 6 is passed to piston power earlier one end of fork 4 through first pin 8 of band cam pin 7; And then through play a leverage, an end is supported on the lower link articulating point of fork through being provided with in the middle on the cylinder body, active force is strengthened and then passes to cylinder axis can have the eccentric bent axle that is provided with and transferring power.On fork 4 block pins 10, arrange can controlled rotation active drive wheel 11 can drive the affixed and can drive the auxiliary drive wheels of cam pin rotation of another termination of fork that be arranged in parallel through mechanical transmission components such as chain, gears with first pin 8.Generally speaking, when crank rotated, last connecting rod 2 received fork 4 controls with lower link 5, makes engine running; When needs adjustment compression ratio; Can be by the control mechanism of routine; The rotation of taking turns through the regulation and control active drive according to work information like control mechanisms such as turbine and worm or train of gearings is rotated the auxiliary drive wheels of device on first pin 8; Rotate thereby drive cam pin 7, piston position is changed change the compression ratio of motor.
Motor after above-mentioned improvement has following advantage in conjunction with the accompanying drawings:
Motor after above-mentioned improvement; As shown in Figure 3; Because the position of lower link on fork; Change the middle part of fork into from the last link end of fork, at first kept the advantage of original mechanism, for example the benefit brought of easy compression ratio adjustment: the position of piston when top dead center can through on the position of the cam pin 7 that is wholely set on set first pin in connecting rod 2 and fork 4 interconnective ends control; And with the affixed auxiliary drive wheels 9 of first pin, equally can by with block pin 10 coaxial 11 controls of active drive wheel that are hinged on the cylinder body.Therefore in the piston motion process; In the time of need not changing compression ratio; The invariant position of active drive wheel, cam pin invariant position at this moment, thus guaranteed that the invariant position of piston when top dead center guaranteed that motor is keeping steady running under the constant compression ratio.When needs change under the engine compression ratio situation; Can implement to rotate to controlled active drive wheel 11 according to the engine operating condition needs by control mechanism; And controlled auxiliary drive wheels 9 is rotated; The position that has changed affixed with it first pin makes the rotation of cam pin 7, thereby the position of piston top dead center is changed and has changed the compression ratio of motor.So just can accomplish to regulate the compression ratio of motor, thereby guarantee that motor works higher thermal efficiency of cycle under through being everlasting, improve fuel efficiency and power character greatly and take into account again and have lower exhaust emission according to the needs of engine operating condition.Because the raising of compression ratio improves the hot merit conversion efficiency, can do more merit under the same fuel consumption in addition.Therefore the compression ratio that improves motor can improve engine power performance simultaneously, under the same power situation of output, can reduce the discharge capacity of motor, further reduces the engine mechanical loss, improves the power per liter of motor.
In addition; Because the change in location of lower link on fork; Make to have become genuine lever by the fork that only plays the swing effect in original technology, it has brought following advantage: one of which; Because the position of lower link and fork articulating point 12 can serve as to change in the scope of the positive and negative 1/4 fork length of symmetry at the mid point with fork 4, the displacement that one side makes piston changes with the position of this articulating point 12; The driving force of lower link driving bent axle acting will increase on the other hand; Its two because the lower link driving force increases, if keep same output torque; Just can dwindle the length of crank 6 in proportion, so both can alleviate the gyrating mass of crank, the motor height is reduced greatly; The complete machine quality reduces, and the motor cost descends; They are three years old; Because the position that is provided with of bent axle 14 is; Make through the vertical line of this bent axle 14 shaft axiss and the mid point vertical line of fork 4 when piston 1 is in top dead center position to have eccentricity value e, thus with piston during at top dead center position the positive heart of the lower link articulating point of fork arrange that the situation of bent axle compares, the length of lower link can increase; Say from Der Grundsatz der Maschinen, favourable to improving the engine crank dynamics; They are four years old; Because the fork strong point is shifted to the fork middle part crank length is shortened greatly; Crank pin 13 and crank spindle 14 laps 15 of consigning obviously strengthen in the accompanying drawing 3, and this just makes bent axle rigidity strengthen greatly, might use broad and the less crank pin of diameter; Not only alleviate inertial mass but also helped the aim of the lightweight of As soon as possible Promising Policy bent axle, little inertia, speed up, long lifetime design, helped prolonging its working life.
In sum, a kind of engine with adjustable compression ratio provided by the invention has following major advantage:
Motor complete machine height is little, and bent axle good rigidity, life-span are long, and cost is low, and dynamics is good, and compression ratio adjustment low speed torque easy, output is big, power is high, and fuel consumption and exhaust emission are few.The Economy and the good dynamic property of automobile-used machine operating mode commonly used.Combine with igniting or injection advance angle adjusting, EGR, HCCI, supercharging and other variable techniques etc., not only can reduce discharging but also can keep good and economic, power character and higher power per liter and dwindle discharge capacity.On basis of the present invention, can use existing any internal-combustion engine advanced technology.
Claims (5)
1. engine with adjustable compression ratio; Include cylinder (16), be positioned at piston (1) and upper tip and the hinged lower end of wrist pin (3) and the hinged last connecting rod (2) of cam pin (7) of cylinder (16); Described cam pin (7) is integrally formed with first pin (8) that is connected with one or two auxiliary drive wheels (9); Described auxiliary drive wheels (9) is coaxial with first pin (8); Also be provided with fork (4), an end of described fork (4) is hinged on first pin (8), and the other end is supported on one or two active drive wheel (11) that and controlled rotation parallel with auxiliary drive wheels (9) were gone up and be coaxially connected with to the pin of second on the engine cylinder-body (10); Described active drive wheel (11) drives auxiliary drive wheels (9) and rotates; It is characterized in that; The middle part of described fork (4) is provided with articulating point (12) and is hinged with the lower link (5) that links to each other with crank (6); Vertical line at the articulating point (12) of the vertical line of the shaft axis of piston (1) bent axle (14) that described crank (6) is connected when being in top dead center position and fork (4) is provided with prejudicially; The position of the middle part articulating point (12) of described fork (4) is in the mid point with fork (4) is the scope of the positive and negative 1/4 fork length of symmetry; The position that is provided with of described bent axle (14) is, makes the vertical line through this bent axle (14) shaft axis and have eccentricity value e at the mid point vertical line of piston (1) fork (4) when being in top dead center position to be: the central axis that is less than or equal to positive and negative 1/2 cylinder (6) is provided with apart from the distance between fork (4) strong point.
2. engine with adjustable compression ratio according to claim 1 is characterized in that, drives through train of gearings between described active drive wheel (11) and the auxiliary drive wheels (9) or drives through chain, friction wheel, belt mode.
3. engine with adjustable compression ratio according to claim 1; It is characterized in that; Described fork (4) two ends are provided with has an auxiliary drive wheels (9) and active drive wheel (11) that rotates and cooperate, when auxiliary drive wheels (9) and active drive are taken turns the homonymy that all is arranged on fork when (11) respectively are provided with; When auxiliary drive wheels (9) and active drive wheel (11) respectively was provided with two, one group of auxiliary drive wheels (9) was wherein taken turns the both sides that (11) are arranged on fork symmetrically with active drive wheel (11) and another group auxiliary drive wheels (9) and active drive.
4. engine with adjustable compression ratio according to claim 1 is characterized in that, the distance between the axis of the axis of described cam pin (7) and first pin, and the maximum adjustment range that makes engine compression ratio is between 6 to 23.
5. engine with adjustable compression ratio according to claim 1 is characterized in that, described active drive wheel (11) is driven by automatically controlled turbine and worm mechanism or gear mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910228632A CN101701548B (en) | 2009-11-20 | 2009-11-20 | Engine with adjustable compression ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910228632A CN101701548B (en) | 2009-11-20 | 2009-11-20 | Engine with adjustable compression ratio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101701548A CN101701548A (en) | 2010-05-05 |
| CN101701548B true CN101701548B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910228632A Expired - Fee Related CN101701548B (en) | 2009-11-20 | 2009-11-20 | Engine with adjustable compression ratio |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195566B (en) * | 2013-04-03 | 2015-01-21 | 浙江大学 | Combustion engine capable of changing displacement continuously |
| CN104653290B (en) * | 2015-01-20 | 2017-04-12 | 西南交通大学 | Parameter-adjustable intelligent high performance engine main framework |
| CN105240119B (en) * | 2015-11-11 | 2018-09-18 | 陆友玲 | A kind of compression engine that when discharge capacity can be changed |
| CN107023386B (en) * | 2017-05-17 | 2022-12-30 | 广州汽车集团股份有限公司 | Variable compression ratio device and variable compression ratio engine |
| CN108104958B (en) * | 2017-12-15 | 2020-04-07 | 东风汽车集团有限公司 | Engine mechanism with variable compression ratio |
| CN108252800A (en) * | 2018-03-29 | 2018-07-06 | 常州机电职业技术学院 | Variable compression ratio adjusting device of piston type internal combustion engine |
| WO2020140843A1 (en) * | 2018-12-30 | 2020-07-09 | 长城汽车股份有限公司 | Variable compression ratio mechanism, engine and automobile |
| CN110671199B (en) * | 2018-12-30 | 2021-07-06 | 长城汽车股份有限公司 | Variable compression ratio mechanism and engine |
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|---|---|---|---|---|
| CN1295181A (en) * | 2000-12-29 | 2001-05-16 | 天津大学 | Reciprocating piston type internal combustion engine |
| JP2002054468A (en) * | 2000-08-08 | 2002-02-20 | Nissan Motor Co Ltd | Variable compression ratio mechanism for internal combustion engine |
| CN1388309A (en) * | 2001-05-29 | 2003-01-01 | 陈瑞光 | High-efficiency engine and its manufacture |
| EP1361350A2 (en) * | 2002-05-09 | 2003-11-12 | Nissan Motor Company, Limited | Link mechanism of reciprocating internal combustion engine |
| CN101016860A (en) * | 2007-02-13 | 2007-08-15 | 天津大学 | Pressure ratio adjustable engine |
| JP2008069753A (en) * | 2006-09-15 | 2008-03-27 | Honda Motor Co Ltd | Stroke characteristic variable engine |
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2009
- 2009-11-20 CN CN200910228632A patent/CN101701548B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002054468A (en) * | 2000-08-08 | 2002-02-20 | Nissan Motor Co Ltd | Variable compression ratio mechanism for internal combustion engine |
| CN1295181A (en) * | 2000-12-29 | 2001-05-16 | 天津大学 | Reciprocating piston type internal combustion engine |
| CN1388309A (en) * | 2001-05-29 | 2003-01-01 | 陈瑞光 | High-efficiency engine and its manufacture |
| EP1361350A2 (en) * | 2002-05-09 | 2003-11-12 | Nissan Motor Company, Limited | Link mechanism of reciprocating internal combustion engine |
| JP2008069753A (en) * | 2006-09-15 | 2008-03-27 | Honda Motor Co Ltd | Stroke characteristic variable engine |
| CN101016860A (en) * | 2007-02-13 | 2007-08-15 | 天津大学 | Pressure ratio adjustable engine |
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Granted publication date: 20120905 Termination date: 20211120 |